Saturday, September 8, 2012

Tech Review Linux: Thursday, September 6, 2012

User Datagram Protocol (UDP)

http://en.wikipedia.org/wiki/User_Datagram_Protocol

core member of the internet protocol suite (see below)
can send with no previous communication

Internet protocol suite

http://en.wikipedia.org/wiki/Internet_protocol_suite

Internet Protocols

Application Layer

FTP
HTTP
SSH
Telnet
iSCSI

Transport Layer

TCP (Transmission Control Protocol)
UDP (User Datagram Protocol)

Internet Layer

IPv4
IPv6

Link Layer

media access control (MAC)

Ethernet
DSL
ISDN

Open System Interconnection (OSI) Model

http://en.wikipedia.org/wiki/OSI_model

Application Layer

HTTP

Presentation Layer

MIME

Session Layer

PPTP
SOCKS

Transport Layer

TCP (Transmission Control Protocol)
UDP (User Datagram Protocol)

Network Layer

Data Link Layer

IEEE 802.2
ATM

Pyhsical Layer

USB
Bluetooth
IEEE 802.3

iSCSI (Internet Small Computer System Interface)

http://en.wikipedia.org/wiki/ISCSI

sends SCSI commands over the internet
storage area network (SAN) protocol
uses TCP (Transmission Control Protocol)
application layer in the Internet protocol suite

Tuesday, September 4, 2012

Tech Review Linux: Saturday, September 1, 2012

Error: apt-get update

W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2EA8F35793D8809A

http://en.kioskea.net/faq/809-debian-apt-get-no-pubkey-gpg-error

the apt-get management tool guarantees the authenticity of the server before updating the Debian OS.
used to following command to resolve:

gpg --keyserver pgpkeys.mit.edu --recv-key 2EA8F35793D8809A
gpg -a --export 2EA8F35793D8809A | sudo apt-key add -

Problems I had:

Spelled the name of the key server wrong.

Forgot the run the second command.

Get the original error message again

PGP: Public Key Servers

http://www.rossde.com/PGP/pgp_keyserv.html

The MIT server I used is not in the list of recommended servers

uses older SKS key server with bug that impairs synchronization from other, non-SKS servers.

There is a long list of dead key servers.
WARNING: Just because one obtains a public key from a server does not mean that the key is authentic.

Must verify the authenticity of the key and its owner.

How Do I Determine My Linux Kernel Version?

http://www2.essex.ac.uk/cs/services/shares/kernel-version.htm

uname -r

3.2.0-23-generic

Ubuntu 12.04 LTS 64 bit Wubi Keeps Locking Up

This has been going on for a while. System often becomes slow and sluggish. Even trying to bring up a terminal or going to a command prompt will take for ever or not work. I have noticed that the mount.ntfs process is taking 99% of the processor time. Have read some where (Sorry, lost the link.) that the NTFS partition might be corrupted. Also read that updating the kernel might fix the problem. Also might be a problem with the size of the partition.

https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/993187

Going to try to see if a dirty or corrupted NFS could be the problem. This seems like a good possibility to me because with Wubi, the Linux partition is running from NTFS.

http://linuxexpresso.wordpress.com/2011/09/20/howto-fix-an-ntfs-partition-in-ubuntu/

List partitions in the system

sudo fdisk -l

I need to look at /dev/sda2

Install tools for workingwith NTFS partitions

sudo apt-get install ntfsprogs

Repair the disk

sudo ntfsfix /dev/sda2

I am a little concerned about running the ntfsfix command.

http://askubuntu.com/questions/93906/ntfs-drive-mounted-generates-huge-load

NTFS drive mounted generates huge load

https://bugs.launchpad.net/ubuntu/+source/ntfs-3g/+bug/395892

2009 and talk of high CPU usage with mount.ntfs-e3g

http://en.wikipedia.org/wiki/Ntfsprogs

says that ntfsprogs was merge with NTFS-3G on April 12, 2011.
says that ntfsfix forces Windows to check NTFS at boot time.

This is not consistent with an earlier link.

http://en.wikipedia.org/wiki/NTFS-3G

often uses FUSE file system
says that Ntfsprogs project was merged with NTFS-3G

http://www.tuxera.com/community/ntfs-3g-download/

NTFS-3G + Ntfsprogs

http://www.ntfs-3g.com/distributions.html

Shows that Ubuntu and Mint are using NFTS-3G by default.

http://www.tuxera.com/community/ntfs-3g-faq/#slow

talks about why the driver can be slow

Which version of ntfsprogs am I using?

Is the mount.ntfs the NTFS-3G driver?

Is the mount.ntfs using FUSE?

How risky is running this command?

What if it destroys my Ubuntu partition?

Mount the windows partition to examine it.

sudo mount -t ntfs /dev/sda2 /mnt

Mount the Wubi drive

sudo mkdir /mnt2
sudo chmod 777 /mnt2
sudo mount -t ext4 /mnt/ubuntu/disks/root.disk /mnt2

I was so amazed when this worked!!

What would I loose on this drive?

BMCS_src
Downloads\Rover
Downloads\FV_Opensource

What would I loose on the windows drive?

ubuntu/disks/root.disk

the critical files are listed above

Backup of Passport/DVDs
Backup of Passport/home
data/BMCSS_2010_05_03.zip
FalconView Class
source/Learning FV (* This is important not to lose *)

What does WUBI Stand for?

http://en.wikipedia.org/wiki/Wubi_(Ubuntu_installer)

Wubi (Windows-based UBuntu Installer)

OK, time to backup critical files.

done

Ready to try fix

Unmount the two drives doing the internal Wubi partition first

sudo umount /mnt2
sudo umount /mnt

Try to fix

sudo ntfsfix /dev/sda2

mint@mint ~ $ sudo ntfsfix /dev/sda2

Mounting volume... OK

Processing of $MFT and $MFTMirr completed successfully.

NTFS volume version is 3.1.

NTFS partition /dev/sda2 was processed successfully.

Doesn't seem to have done anything.

Seems to be working now.

Need to update makemkv

sudo apt-get install build-essential libc6-dev libssl-dev libexpat1-dev libgl1-mesa-dev libqt4-dev

no changes

cd makemkv-oss-1.7.7
make -f makefile.linux
sudo make -f makefile.linux install
cd ..\makemkv-bin-1.7.7
make -f makefile.linux
sudo make -f makefile.linux install

Monday, August 20, 2012

Tech Review: Linux: Friday, August 17, 2012

How to create a continuous digital clock in the terminal

http://www.linuxandlife.com/2012/08/how-to-create-continuous-digital-clock.html

watch -n 1 data +%r

Oracle Releases VirtualBox 4.2 Beta 1

http://www.phoronix.com/scan.php?page=news_item&px=MTE1MzY

Monday, August 6, 2012

Tech Review: Linux: Friday, August 3, 2012

Google Releases Chrome 21 Stable for Linux

http://news.softpedia.com/news/Google-Releases-Chrome-21-Stable-for-Linux-284134.shtml

It was difficult to figure out how to download
Installing 64bit version on HP Linux
Ubuntu says it has not been reviewed yet.
There is not good feed back while it is install in Ubuntu Software Center.
How would I do this from the command line?
This doesn't overwrite the current version of Chrome
Sure can see a lot when I run this from the command line.
found the command in Dash Home and drag to side bar.
what is the difference between this 'Google Chrome' and the 'Chrome Web Browser'?

Monday, July 30, 2012

Tech Review: Linux: Monday, July 30, 2012

How do I tell the gateway address in Redhat?

http://www.linuxquestions.org/questions/linux-general-1/cant-find-gateway-ip-on-redhat-9-a-103968/

/sbin/route -n
The default gateway will be the bottom line and second column.

How to make your Nexus 7 not suck

http://www.zdnet.com/how-to-make-your-nexus-7-not-suck-7000001220/

Uses Android Smartphone user interface

has problems
Install Apex Launcher instead
Would have to hacking to fix otherwise

Monday, July 16, 2012

Tech Review: Linux: Monday, July 16, 2012

'Secure' boot: much to be scared about

http://www.itwire.com/opinion-and-analysis/open-sauce/55683-secure-boot-much-to-be-scared-about/55683-secure-boot-much-to-be-scared-about?start=1

secure boot cannot be disabled for ARM processors
secure boot can kill a machine

malware changes a system file

control not security

Remember, this company is not known for playing nice. Maybe Luke should have said to Yoda, "I'm not afraid of secure boot." And Yoda reply would have been "But you will be."

Perhaps the correct term is restrictive booting. Like the article said it's nothing of about security and everything about restricting the hardware.

Can you just imagine what the world would look like if Microsoft hadn't missed the tablet/smart phone start? They could be a major sue-er like Apple.

Tech Review: Linux: Monday, July 16, 2012

installing linux mint from a usb

http://community.linuxmint.com/tutorial/view/744

This didn't work for making an Ubuntu stick for 12.04

Linux Mint - Mate Edition

http://www.linuxmint.com/documentation/user-guide/english_13.0.pdf

User manual

installing grub2 to an external drive

http://ubuntuforums.org/showthread.php?t=1401997

http://www.dedoimedo.com/computers/grub-2.html

grub hangs when loading normal.mod

https://www.google.com/webhp?sourceid=chrome-instant&ie=UTF-8#hl=en&output=search&sclient=psy-ab&q=grub%20hangs%20when%20loading%20normal.mod&oq=&gs_l=&pbx=1&fp=1&biw=1280&bih=899&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.,cf.osb&cad=b

GNU GRUB Manual 2.00

http://www.gnu.org/software/grub/manual/grub.html

http://www.gnu.org/software/grub/manual/grub.html#GRUB-only-offers-a-rescue-shell

Grub2

http://www.dedoimedo.com/computers/grub-2.html

https://help.ubuntu.com/community/Grub2?action=show&redirect=GRUB2

http://www.gnu.org/software/grub/manual/html_node/Command_002dline-and-menu-entry-commands.html

GRUB command line

what can I do from grub rescue?

http://ubuntuforums.org/showthread.php?t=1326788

GRUB RESCUE prompt

Old GRUB Tutorial

http://www.dedoimedo.com/computers/grub.html

grub partition not found

http://www.supergrubdisk.org/wiki/Howto_Fix_Grub

Sunday, July 15, 2012

Tech Review: Linux: Sunday, July 15, 2012

handbrake linux

http://handbrake.fr/

https://launchpad.net/~stebbins/+archive/handbrake-releases

They currently don't have a version for Ubuntu 12.04 LTS (Precise Pangolin)
Used the following link

handbrake for ubuntu 12.04

http://www.thepowerbase.com/2012/03/install-handbrake-in-ubuntu-12-04/

sudo apt-add-repository ppa:stebbins/handbrake-snapshots
sudo apt-get update
sudo apt-get install handbrake-gtk

using handbrake to shrink mkv

Handbrake works great. Took my 5 GB movie to a 1GB movie.

Current Version of Ubuntu

what is the name of ubuntu 12.04

http://en.wikipedia.org/wiki/List_of_Ubuntu_releases#Ubuntu_12.04_LTS_.28Precise_Pangolin.29

Precise Pangolin

Saturday, July 7, 2012

Tech Review: Linux: Saturday, July 7, 2012

How to install Grub from a live Ubuntu cd

http://ubuntuforums.org/showthread.php?t=224351

  mkdir /mnt/root  mount /dev/xxx? /mnt/root  chroot /mnt/root /bin/bash  grub-install /dev/xxx

Friday, June 22, 2012

Tech Review Linux: Thursday, June 21, 2012

Microsoft unexpectedly ships a new version of Skype for Linux

http://www.zdnet.com/blog/open-source/microsoft-unexpectedly-ships-a-new-version-of-skype-for-linux/11229?alertspromo=&tag=nl.rSINGLE

Shuttleworth on Ubuntu Linux, Fedora, and the UEFI problem

http://www.zdnet.com/blog/open-source/shuttleworth-on-ubuntu-linux-fedora-and-the-uefi-problem/11270?alertspromo=&tag=nl.rSINGLE

Linux grabs its single biggest win

http://www.techrepublic.com/blog/opensource/linux-grabs-its-single-biggest-win/3690?tag=nl.e550

Navy switch to LInux because of Win virus

Wine 1.4.1 released

http://ubuntugamingproject.blogspot.it/2012/06/wine-141-released.html

GStreamer SDK aims to simplify cross-platform multimedia development

http://arstechnica.com/information-technology/2012/06/gstreamer-sdk-aims-to-simplify-cross-platform-multimedia-development/

Basic tutorial 1: Hello world!

http://docs.gstreamer.com/pages/viewpage.action?pageId=327735

Getting started with GStreamer with Python

http://www.jonobacon.org/2006/08/28/getting-started-with-gstreamer-with-python/

Monday, June 11, 2012

Tech Review Linux: Monday, June 11, 2012

First Computer that Comes with Mint Loaded ($476/$549)

http://www.fit-pc.com/web/purchase/order-direct-mintbox/

dual monitors

http://www.zdnet.com/blog/open-source/first-linux-mint-pcs-go-on-sale/11193?alertspromo=&tag=nl.rSINGLE

Thursday, June 7, 2012

Tech Review Linux: Wednesday, June 6, 2012

Oracle verdict double plus good for Linux movement

http://www.theregister.co.uk/2012/06/05/oracle_verdict_oin/

OIN (Open Invention Network)
defensive patent-portfolio

Wednesday, May 16, 2012

Tech Review Linux: Monday, May 15, 2012

how do I change the computer name in ubuntu 12.04?

It is important to know the correct question to ask in Google. The following questions didn't work.

ubuntu 12.04 how do I change the device name?
how do I rename the machine in ubuntu 12.04?

Change Computer Name in Ubuntu 11.10

http://www.omgubuntu.co.uk/2012/01/how-to-change-hostname-in-ubuntu-11-10/

Basically you have to edit /etc/hostname and /etc/hosts to the new name.
The above example works for Ubuntu 12.04

Saturday, May 5, 2012

Tech Review Linux: Friday, May 4, 2012

Dodge Windows Behavior Missing from 12.04 LTS

http://www.ubuntugeek.com/howto-unity-with-dodge-windows-and-minimizeunminimize-behavior-in-ubuntu-12-04-precise.html

gives command line instructions to add

Diagram showing the relationship between X clients and an X server

Enable multiuser logins with VNC

http://www.ibm.com/developerworks/linux/library/os-multiuserloginsvnc/index.html?ca=drs-

Tech Review Linux: Saturday, April 28, 2012

The nightmare I had last Friday was caused to two issues.

I was using an older Ubuntu (10.4) with a laptop with newer graphics

laptop

HP Pavilion dv67 Select Edition

graphics

Intel HD Graphics 3000

The recommended install on the Ubuntu site is broke

http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows

They recommended Pen Drive Linux; however, the USB stick didn't work for 12.04

Creating a stick with LinuxLive USB Creator did work.

http://www.linuxliveusb.com/

Used Tuxboot as the install method to the USB stick.

http://tuxboot.org/index.php
The Tuxboot automatically download the relatively small install.
Download was here: http://tuxboot.org/download/files-on-sf.php

Monday, April 30, 2012

Tech Review Linux: Friday, April 27, 2012

Got my new HP dv6t Select Ed. Look good but I cannot get Linux to run on it. I believe that problem has to do with the graphics. However, since the whole reason that I got this laptop was because it is using the Intel HD Graphics processor, the fact that I can't get Linux to work is more than just a little frustrating.

Trying to create a bootable USB stick, but I may have pulled it before is was finished writing. Trying to create it again. Was surprise by how quickly the ISO downloaded.

Using the Universal USB Installer from windows to create the stick.

Trying to boot from drive but I am getting the following message: